Allgrip Self Tapping Screw No.8 x 1in, CSK Pozi, BZP, supplied in a pack of 500.
Self tapping screws cut their own thread in pre-drilled sheet metal, plastic and thin section steel. Used for fixing panels, brackets, trims and enclosures.
Drill a pilot hole to the recommended size for the gauge and drive with a Pozi or slotted screwdriver.